GHSA-3hp8-6j24-m5gm

Source

https://github.com/advisories/GHSA-3hp8-6j24-m5gm

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/09/GHSA-3hp8-6j24-m5gm/GHSA-3hp8-6j24-m5gm.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-3hp8-6j24-m5gm

Published

2024-09-23T22:05:58Z

Modified

2024-12-03T06:15:28.865673Z

Summary

Camaleon CMS vulnerable to remote code execution through code injection (GHSL-2024-185)

Details

The actions defined inside of the MediaController class do not check whether a given path is inside a certain path (e.g. inside the media folder). If an attacker performed an account takeover of an administrator account (See: GHSL-2024-184) they could delete arbitrary files or folders on the server hosting Camaleon CMS. The crop_url action might make arbitrary file writes (similar impact to GHSL-2024-182) for any authenticated user possible, but it doesn't seem to work currently.

Arbitrary file deletion can be exploited with following code path: The parameter folder flows from the actions method:

  def actions
    authorize! :manage, :media if params[:media_action] != 'crop_url'
    params[:folder] = params[:folder].gsub('//', '/') if params[:folder].present?
    case params[:media_action]
    [..]
    when 'del_file'
      cama_uploader.delete_file(params[:folder].gsub('//', '/'))
      render plain: ''

into the method delete_file of the CamaleonCmsLocalUploader class (when files are uploaded locally):

def delete_file(key)
  file = File.join(@root_folder, key)
  FileUtils.rm(file) if File.exist? file
  @instance.hooks_run('after_delete', key)
  get_media_collection.find_by_key(key).take.destroy
end

Where it is joined in an unchecked manner with the root folder and then deleted.

Proof of concept The following request would delete the file README.md in the top folder of the Ruby on Rails application. (The values for authtoken, X-CSRF-Token and _cmssession would also need to be replaced with authenticated values in the curl command below)

curl --path-as-is -i -s -k -X $'POST' \
    -H $'X-CSRF-Token: [..]' -H $'User-Agent: Mozilla/5.0' -H $'Content-Type: application/x-www-form-urlencoded; charset=UTF-8' -H $'Accept: */*' -H $'Connection: keep-alive' \
    -b $'auth_token=[..]; _cms_session=[..]' \
    --data-binary $'versions=&thumb_size=&formats=&media_formats=&dimension=&private=&folder=..
2F..
2F..
2FREADME.md&media_action=del_file' \
    $'https://<camaleon-host>/admin/media/actions?actions=true'

Impact

This issue may lead to a defective CMS or system.

Remediation

Normalize all file paths constructed from untrusted user input before using them and check that the resulting path is inside the targeted directory. Additionally, do not allow character sequences such as .. in untrusted input that is used to build paths.

Database specific

{
    "nvd_published_at": null,
    "cwe_ids": [],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2024-09-23T22:05:58Z"
}

References

Affected packages

RubyGems / camaleon_cms

Package

Name: camaleon_cms
Purl: pkg:gem/camaleon_cms

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.8.1

Affected versions

0.*

0.0.1

0.0.2

0.1.2

0.1.3

0.1.4

0.1.5

0.1.6

0.1.7

0.1.8

0.1.9

0.2.0

0.2.1

1.*

1.0

1.0.1

1.0.2

1.0.3

1.0.4

1.0.5

1.0.6

1.0.7

1.0.8

1.0.9

1.1.0

2.*

2.0.1

2.0.2

2.0.3

2.0.4

2.0.4.1

2.1.0

2.1.1

2.1.1.4

2.1.2.0

2.1.2.1

2.2.0

2.2.1

2.3.0

2.3.1

2.3.2

2.3.3

2.3.4

2.3.5

2.3.6

2.3.7

2.3.7.1

2.3.7.2

2.4.0

2.4.1

2.4.2

2.4.3

2.4.3.1

2.4.3.2

2.4.3.3

2.4.3.4

2.4.3.5

2.4.3.6

2.4.3.7

2.4.3.8

2.4.3.9

2.4.3.10

2.4.3.11

2.4.3.12

2.4.3.13

2.4.4

2.4.4.1

2.4.4.2

2.4.4.3

2.4.4.4

2.4.4.5

2.4.4.6

2.4.4.7

2.4.5

2.4.5.1

2.4.5.2

2.4.5.3

2.4.5.4

2.4.5.5

2.4.5.7

2.4.5.8

2.4.5.9

2.4.5.10

2.4.5.11

2.4.5.12

2.4.5.13

2.4.5.14

2.4.6.0

2.4.6.1

2.4.6.2

2.4.6.3

2.4.6.4

2.4.6.5

2.4.6.6

2.4.6.7

2.4.6.8

2.4.6.9

2.5.0

2.5.1

2.5.2

2.5.3

2.5.3.1

2.6.0

2.6.0.1

2.6.1

2.6.2

2.6.3

2.6.4

2.7.0

2.7.1

2.7.2

2.7.3

2.7.4

2.7.5

2.8.0